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ISA CAP > Week 9 > Flashcards

Week 9 Flashcards

1
Q

Which layer in the ISO/OSI seven-layer stack handles external network addressing?
a. Layer 2, data link layer
b. Layer 3, network layer
c. Layer 5, session layer
d. Layer 7, application layer

A

b. Layer 3, network layer

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2
Q

Compared with device and sensor networks, ControlNet system architecture
a. is more focused on providing a communications backbone.
b. simplifies commissioning.
c. reduces cost and wiring in system retrofits.
d. is focused on providing communications to large sensor networks.

A

a. is more focused on providing a communications backbone.

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3
Q

Which statement BEST describes PROFINET’s use of eXtensible Markup Language
(XML)?
a. It simulates machine language for all types of control systems.
b. It specifies steps or procedures that tell the computer network what to do and
how to do it.
c. It describes what data means and facilitates use of the data without human
intervention.
d. It determines how data should be displayed.

A

c. It describes what data means and facilitates use of the data without human
intervention.

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4
Q

Which type of error protection and correction uses a complex polynomial that results
in a frame check sequence being added to a message?
a. Checksum
b. Cyclic redundancy code
c. Error correcting code
d. Parity error detection

A

b. Cyclic redundancy code

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5
Q

Routing in an industrial network is the primary function of which layer of the ISO/OSI
seven-layer stack?
a. Layer 1, physical layer
b. Layer 2, data link layer
c. Layer 3, network layer
d. Layer 4, transport layer

A

c. Layer 3, network layer

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6
Q

The primary functions of industrial networks include all of the following EXCEPT
a. to retrieve data for use in business or engineering applications.
b. to allow operators and engineers to query and change the operation of plant
devices.
c. to become more proprietary based on performance advantages.
d. to serve as a data highway connecting electronic devices in a plant.

A

c. to become more proprietary based on performance advantages.

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7
Q

All of the following capabilities would be considered to be Ethernet Industrial Protocol
(EtherNet/IP) advantages EXCEPT
a. non-deterministic nature.
b. open network standards.
c. lower component costs.
d. broad usage and support.

A

a. non-deterministic nature.

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8
Q

All of the following are benefits of WorldFIP EXCEPT
a. messaging services and a message packet of 256 bytes provide a transparent
connection to the Internet.
b. deterministic high-speed response facilitates effective time-critical data and
event data transmission.
c. a complete range of applications from large PLCs down to low-end
nonintelligent sensors are possible.
d. different protocols are included to cover the range of applications.

A

d. different protocols are included to cover the range of applications.

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9
Q

What makes checksum a more efficient form of error detection and correction than
parity error detection?
a. A cyclic redundancy code (CRC) algorithm
b. Complex error correcting code (ECC) appended to the message
c. Exclusive or-ing (XOR) all of the bytes in the message
d. A frame check sequence (FCS)

A

c. Exclusive or-ing (XOR) all of the bytes in the message

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10
Q

One of the duties of the Transmission Control Protocol (TCP) is to
a. provide a time slot for transmitting data.
b. ensure that a message is reliably delivered to the end destination.
c. deliver IP packets between two IP address using “best effort” methods.
d. segment long messages.

A

b. ensure that a message is reliably delivered to the end destination.

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11
Q

Which type of industrial network has nodes that concentrate data from several
devices at one location, the network connection hub?
a. Process control fieldbus
b. Information technology (IT) networks
c. Control level networks
d. Discrete sensor data

A

d. Discrete sensor data

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12
Q

The two factors that determine the number of devices that can be powered from the
FOUNDATION Fieldbus H1 bus are the
a. device signaling characteristics and the classification of non-incendive or not.
b. use of intrinsic safety and the classification of non-incendive or not.
c. use of intrinsic safety and recognition of application layers.
d. baud rates and device signaling characteristics.

A

b. use of intrinsic safety and the classification of non-incendive or not.

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13
Q

In MODBUS application commands and relay ladder logic (RLL), a single output bit
describes a
a. register.
b. coil.
c. force.
d. mask.

A

b. coil.

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14
Q

Which of the following services is characteristic of ISO/OSI layer 7, the application
layer?
a. Fast, low-level signaling
b. Data encryption
c. Translation of character encoding
d. File Transfer Protocol (FTP)

A

d. File Transfer Protocol (FTP)

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15
Q

Which characteristic differentiates discrete sensor networks from process control
networks at the device level?
a. Very fast cycle times
b. Fieldbus replacement of point-to-point links
c. Simplicity with many signal processing features
d. Improved interoperability

A

b. Fieldbus replacement of point-to-point links

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16
Q

What is the significance of the Fieldbus Intrinsic Safety Concept (FISCO)?
a. It decreases the number of field devices per trunk compared with traditional
area classification practices.
b. It simplifies the rules governing energy storage in field cables and makes more
power available to the fieldbus trunk.
c. It increases safety requirements for live-working on trunk and spurs.
d. It standardizes safety documentation for fieldbus circuits in Division 2
hazardous areas, in which the explosion hazard is expected only in abnormal
circumstances.

A

b. It simplifies the rules governing energy storage in field cables and makes more
power available to the fieldbus trunk.

17
Q

Which of the following is NOT an improvement to Modbus communications resulting
from Modbus/TCP?
a. Improved remote operation via the corporate LAN or the Internet
b. Increased operational speed
c. Lower cost by using commercial Ethernet components
d. Reduced Internet security problems

A

d. Reduced Internet security problems

18
Q

An advantage of star topology is
a. the central “backbone cable” minimizes the distance a device signal has to
travel.
b. disconnection of any one device will not disrupt the rest of the network.
c. connections to the bus provide short-circuit protection.
d. it allows maximum flexibility when configuring and assigning devices to
segments.

A

b. disconnection of any one device will not disrupt the rest of the network.

19
Q

To combat high levels of electrical noise in processing plants, industrial networks
typically use
a. wireless technology.
b. bridge devices.
c. shielded cable.
d. a FOUNDATION Fieldbus.

A

c. shielded cable.

20
Q

FOUNDATION Fieldbus HSE improves on FOUNDATION Fieldbus H1 architecture
by
a. providing higher noise immunity.
b. increasing the number of devices that can be powered from an intrinsically
safe fieldbus.
c. joining segments directly.
d. facilitating remote device configuration and diagnosis.

A

c. joining segments directly.

21
Q

The function of the highest layer in a communications stack is to
a. segment long messages.
b. provide the interface to the user.
c. communicate the error detection algorithm.
d. confirm the type of electrical signals used in the transmission.

A

b. provide the interface to the user.

22
Q

Which type of network topology has alternate paths to pass messages with the
route defined by the destination address?
a. Daisy chain
b. Ring
c. Multidrop
d. Mesh

A

d. Mesh

23
Q

Which of the following sensor networks often uses a flat cable and sensors and
actuators purchased with M12 connectors?
a. Control area network (CAN)
b. ControlNet
c. Actuator/sensor interface (AS-interface or AS-i)
d. DeviceNet

A

c. Actuator/sensor interface (AS-interface or AS-i)

24
Q

A fieldbus network designed to provide an integrated sensor network called the local
loop BEST describes
a. Local Operating Network (LONWorks).
b. Interbus.
c. PROFIBUS-PA.
d. Modbus.

A

b. Interbus.

25
Q

Which network access method polls all nodes and requests them to send data?
a. Master/slave
b. Arbitration
c. Token passing
d. Contention

A

a. Master/slave

26
Q

A characteristic differentiating daisy chain topology from multidrop network topology
is
a. improved signal monitoring.
b. greater power requirements.
c. signal routing.
d. increased reliability.

A

c. signal routing.

27
Q

The maximum number of nodes an actuator/sensor interface (AS-interface or AS-i)
can support is
a. 8.
b. 31.
c. 62.
d. 124.

A

b. 31.

28
Q

The objective of a Local Operating Network (LONWorks) is to
a. simplify configuration.
b. embed the entire communications stack in a microcontroller.
c. provide high-speed deterministic cyclical communication.
d. simplify commissioning.

A

b. embed the entire communications stack in a microcontroller.

29
Q

Which network access method listens for inactivity before transmitting data?
a. Contention
b. Arbitration
c. Token passing
d. Master/slave

A

a. Contention

30
Q

Which characteristic differentiates ring topology from daisy chain network topology?
a. Direction of data movement
b. Flexibility in configuration
c. Spur lengths
d. Wiring of the last device

A

d. Wiring of the last device

31
Q

Which industrial network is MOST associated with automotive applications?
a. ControlNet
b. Control area network (CAN)
c. FOUNDATION Fieldbus HSE
d. FOUNDATION Fieldbus H1

A

b. Control area network (CAN)

32
Q

Which of the following industrial automation networks provides a widely used
backbone bus for integrating controllers and I/O systems through simple-to-write
drivers that use standard PC serial ports?
a. PROFIBUS-PA
b. Interbus
c. Modbus
d. FOUNDATION Fieldbus HSE

A

c. Modbus

33
Q

The physical layer of the ISO/OSI seven-layer stack includes information on all of
the following EXCEPT
a. signaling method.
b. data framing.
c. type of connectors supported.
d. voltage levels.

A

b. data framing.

34
Q

Hop message passing is characteristic of which topology?
a. Daisy chain
b. Dual redundant counter-rotating ring topology
c. Star
d. Mesh

A

d. Mesh

35
Q

All of the following DeviceNet capabilities would be considered to be network
advantages EXCEPT
a. control area network (CAN)-based structure with well-defined application layer.
b. good connectivity.
c. high speed data transfer.
d. standardized connectors, cabling, and power supply.

A

c. high speed data transfer.

36
Q

Which of the following industrial automation networks is characterized by highspeed signaling to support host system updates at very short distances?
a. Modbus
b. PROFIBUS-DP
c. PROFINET
d. PROFIBUS-PA

A

b. PROFIBUS-DP

37
Q

Which layer in the ISO/OSI seven-layer stack provides information on addressing
and error detection/correction methods?
a. Layer 2, data link layer
b. Layer 3, network layer
c. Layer 5, session layer
d. Layer 7, application layer

A

a. Layer 2, data link layer

38
Q

A direct result of Honeywell’s Smart Distributed System (SDS) being embedded in
sensors and actuators is
a. accommodation of longer data values.
b. routing of data across multiple subnets.
c. highly synchronized messaging.
d. use of a lower-cost controller.

A

d. use of a lower-cost controller.

39
Q

In FOUNDATION Fieldbus H1, the basic requirement for intrinsic safety is the use of
a. junction and field marshalling boxes.
b. M12 connectors.
c. a barrier.
d. chicken-foot topology.

A

c. a barrier.

ISA CAP (16 decks)

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